There is a key chapter of each book in the Pentateuch which foreshadows the suffering of Christ on the cross.

Genesis 22 : Substitution (Ram) - Delights of God
Exodus 12 : Redemption (Lamb) - Deliverance of His People
Leviticus 16 : Atonement (Bull, Goats) - Dwelling of God
Numbers 19 : Purification (Red Heifer) - Defilement of His People
Deuteronomy 21 : Expiation (Heifer) - Dealing with Sins